Borderlands, the hybrid FPS/MMO from Gearbox Software, is absolutely brilliant. You should know this by now. It's one of the finest cooperative shooters of this generation and is an absolute riot to play with mates... and for the rest of the day, it also happens to be less than three quid on PC. If you haven't bought it already, it's probably time you did.

Note that this doesn't include any of the DLC - and if you want the full experience, you'll need to shell out for the Game Of The Year Edition. Here are the best prices.